Section 7 mentions a Record URI which provides a link to a separate record
holding a description of a related resource. I presume this implies that in
some cases this URI will not be the same as a URI identifying the related
Is this Record URI valid as a value URI for the property making the
relationship between the two resources ?. Does it need to be distinguished
from a value URI that is actually identifying the resource, as opposed to
the record ?. Can both be present at the same time ?.